Pick out the incorrect statements (s) from the following
(1) Glucose exists in two different crystalline forms, `alpha`-D-glucose and `beta`-D-glucose
(2) `alpha`-D-glucose and `beta`-D-glucose are anomers
(3) `alpha`-D-glucose and `beta`-D-glucose are enantiomers
(4) Cellulose is a straight chain polysaccharide made of only `beta`-D-glucose units
(5) Starch is a mixture of amylose and amylopecting, both contain unbranched chain `alpha`-D-glucose unit

Options

A. 1 and 2
B. 2 and 3
C. 3 and 4
D. 3 and 5

Answer

D

Explanation

Starch obtained from same source consists of two fractions i.e., amylose (20%) and amylopectin (80%) Amylose is a linear polymer while amylopectin is a highly branched polymer. Both are composed of `alpha–D-` glucose units linked by glycosidic linkages. `alpha– D-`glucose and `beta– D–` glucose are anomers to each other not the enantiomers